Apparatus for and method of continuously making monolithic hollow objects.



PATENTED JUNE 25. 1907 J. M. BOYLE. APPARATUS FOR AND METHOD OFGONTINUOUSLY MAKING MONOLITHIG HOLLOW OBJECTS.

PLIOATION 1 11,21) ran. 20, 1907.

ATTORNEY citizen of the United States, residing UNITED STATES JAMES M.BOYLE, OF NEW YORK, N.

PATENT OFFICE.

Y., ASSIGNOR TO MoNoLITHIo nuc'r COMPANY, A CORPORATION OF NEW YORK.

APPARATUS FOR AND METHOD OF CONTINUO USLY MAKING MONOLITHIC HOLLOWOBJECTS.

Specification of Letters Patent.

Patented June 25, 1907.

To all whom it may concern:

Be it known that 1, JAMES M. BOYLE, a at New York, in the county of NewYork and State of New York, have invented a certain new and usefulImprovement in Ap aratus for and Method of Continuously aking MonolithicHollow Objects, of which the following is a specification.

The invention relates to continuous monolithic conduits, and consists inmeans, as

hereinafter set forth, for continuously making said conduit of plasticmaterial capable of hardening on setting, and simultaneously embeddingtherein a. removable core and also, if desired, bars, strips or wires-ofreinforcing material.

The invention further consists in the method of and apparatus forproducing said conduits in a simultaneously formed earth mold or trench.

In the accompanying drawingFigure 1 is a vertical section of theapparatus in place in an open mold or trench, on the line 3 y. of Fig.3. Fig. 2 is a top view with the receptacle 2 in section on the line a;x of Fig.1. Fig. 3 is a cross section on the line 2 2 of Fig. 1.

Similar numbers of reference indicate like parts.

The conduit ma be made directly in the trench 1, but preferably in anearth inold formed therein, in the manner hereinafter described. The aparatus, as herein illustrated, includes rst, a receptacle 2 into whichthe plastic material is constantly shoveled, and which travels along thetrench second, a support 3 which travels in the trench and carries theconduit core and reinforcing stripson suitable reels; and third, a guideand mold former 4, which leads the core and reinforcing strips to thereceptacle 2 and also forms the sides of the earth mold. These threeparts, receptacle 2, support 3 and former 4 are connected by anysuitable co uplings 5, and are moved'continuously forward in the trenchby any suitable means, as for example, a chain 6 connected to support 3and carried'to any suitable stationary winding device, not shown.

The receptacle 2 is mounted on trucks 7, which run on the edges of thetrench, and has a hopper 9, the front wall 10 of which extends to thebottom of the trench. At its lower edge, said wall is turned rearwardlyfor a short distance, as shown at 11. Said edge is rounded so as tosmooth the bottom of the trench as the receptacle moves forward. Therear wall 12 of the hopper is flanged rearwardly at 13. The height ofthe horizontal flange 13 above the bottom of the trench determines thevertical thickness of the conduit and the lower face of said flangeserves to smooth the upper surface of the plastic mass as the receptacle2 n10ves ahead. The rear edge of flange 13 is preferably curvedupwardly.

In the front wall 10 is an opening to receive the flexible distensiblecore 14. One end of said core is secured in place in any suitable wayand communicates by ipe 15 with any suitable source 16 of fluid underpressure. After passing-through the guide ,openin s 17 and 18 in thefront and rear walls of former 4, said core is coiled on a reel 19,mounted on the latform of support 3. Also in the front wall 10 ofreceptacle 2 are openings 20, through which pass bars, strips or wires21 of reinforcing material, such as iron or steel. Said bars are to beflexible, so that after passing through guide openings in the walls offormer 4 they may be wound on reels 23, also on support 3.

Support 3 is of any suitable sled like conhas openings to permit saidcore and bars to pass down through it to the open rear end of thesupport and so to the guide openings in the front wall of former 4.Former 4, also of any suitable sled-like construction has a roof orcover 25, with inclined sides. In the opening 17 in its rear wall,through which the core 14 passes, it has a projection which forms aconstriction 26 in said core; In the core is a double piston 27, whichis movable therein, and which as shown, in Fig. 1, bears against saidcore constriction.

The operation of the device is as follows: The receptacle 2 is disposedat the end of the trench from which work is to begin. The

removing theplug which closes the extremity 28 and said extremity isthen again closed.

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Fluid pressure is then turned onfrom the source 16. This drives thepiston brough the core until it reaches the constriction 26. In this waythe length ofcore between said constriction and reel 19 is sealed andremains in deflated condition, while only the embedded portion ofthecore is distended. Earth is shoveled down upon the roof or cover offormer, 4, and is guided by the sloping sides 22 of said roof into thespaces 29 between the smooth vertical sides 3O of former 4 and thevertical sides of the trench. As it enters said spaces it is to bepacked or tamped down by any suitable means. In this way an earth moldis continuously produced for the reception of the deposited plasticmaterial, the sides being formed straight and true by the sides 22 offormer 4, and the bottom leveled by the passage over it of the former 4,support 3 and turned flange 1-1 on 27 follows the constriction in thecore and thus maintains the seal between the distended and non-distendedportions thereof. The core and reinforcing bars are continuously paidoil the reels 19 and 23 and remain embedded in the plastic mass behindthe receptacle 2. After the desired length of conduit is completed, thepiston is removed from the core and the core emptied of its dis-tendingfluid and removed.

it will be apparent that by this apparatus 1 can continuously makemonolithic conduits of any length, containing, if desired, reinforcingbars or strips, in an ordinary earth. trench.

1 claim 1. A receptacle movable along the length of an earth trench forcontinuously depositing plastic material therein and a former havingsmooth vertical sides and disposed in ad vance of and movable with saiddepositin receptacle; the said former being constructed of less widththan said trench to provide a molding space on each side of. said formerand between said former and the trench walls for the reception of earth.

7 ing plastic material therein, a former having smooth vertical sidesand a root or cover slop ing to said sides: the said former beingdisposed in advance of and movable with said receptacle and beingconstructed of less s57,sss

width than said trench to produce a molding space on each-side of saidformer and between said former and the trench walls for the reception ofearth.

3; A device for supporting and paying out a flexible core in apreviously formed open earth trench of troughshaped cross section, adevice including a guide for said core as it is paid out and smoothvertical side walls for smoothing the vertical sides of said trench anda device for continuously depositing plastic material in said trench andin cont act with the smoothed sides thereof to embed said core, the saiddevices being connected together and advanced in the trench in the ordernamed, and means for continuously moving said devices along the lengthof said trench.

4. In combination with a stationary open mold, a device for paying out aflexible core into said mold, a device for depositing plastic materialin said mold to embed said core and means for continuously moving saiddevices along the length of said mold.

5. in combination with a stationary open mold, a device for paying out aflexible core into said mold, a device for paying out a fleXible stripof reinforcing material into said mold, a device for depositing plasticmaterial in said mold to embed said core and strip and means forcontinuously moving said devices along the length of said mold.

l"). in combination with a stationary open mold, a device for paying outa flexible core into said mold, a device for depositing plastic materialin said mold to embed said core, a guide for said core interposedbetween the said devices, and means for continuously moving said devicesand guide along the length of said mold.

7. In combination with an open mold, means movable along the length ofsaid mold for continuously paying out into said mold a flexible core,and means also movable along the length or said mold for depositingmaterial therein to embed said core.

8. in combination with an open mold, means for continuously paying outinto said mold a flexible core, means for continuously paying out intosaid mold a flexible strip of reinforcing material and means forcontinuou'sl y depositing in said mold plastic material to embed saidcore and strip; all of said means being movable along the length of saidmold.

9. In combination with an open mold, means for continuously paying outinto said mold a flexible core, means for continuously depositing insaid mold plastic materialto embed said core, and means, interposed between said paying out means and said depositing means, for guiding saidcore: all of said means being movable along the length or said mold.

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10. In combination with a stationary open mold, a support means formoving said support continuously along the length of said mold, aflexible core in coil form having one extremity secured at the endofrsaid mold, a reel on said support carrying said coil, and a devicealso movable along the length of said mold for continuously depositingplastic material in said mold to embed said core, as said core is paidout from said reel.

1 1,. In combination with a stationary open mold, a device for laying aflexible distensible'core therein, a device for depositing plasticmaterial insai'd mold to embed said core, means for continuously movingsaid devices along the length of said mold, and means for distending theembedded portion of said core by internal fluid pressure.

12. In combination With a stationary open mold, a device for laying aflexible distensible core therein, a device for depositin plasticmaterial in said mold to embed said core, means for continuously movingsaid devices along the length of said mold, means for distending saidcore by internal fluid pressure and means for limiting the length ofsaid core so distended to the embedded portion thereof.

13. In combination with a stationary open mold, a devicefor paying out aflexible distensible core into said mold, a device for depositingplastic material in said mold to embed said core, means for supplyingder pressure to thepaid out end 0 saidcore,

means for continuously moving said devices along the length of saidmold.

1 1. In combination with a stationary open mold, a support means forcontinuously moving said support along the length of said mold, aflexible distensible core in coil form carried by said support, havingone extremity secured at the end of said mold, means for admitting fluidunder pressure to said core atsaid secured end, a piston in said core, adevice for continuously depositing plastic material in said mold toembed said core1 and means for pro using a traveling constric in )11 insaid core in advance of said piston.

15. Themeth od of continuously produc ing in a trench, an open earthmold for a oon-' tinuous monolithic conduit, which consists in causingsald trench to be traversed in advance of the means for depositing theplastic.

material to be embedded by a former of less width than said'trench andhaving smooth vertical sides, and continuously packin earth in thespaces between the sides of sai former and the sides of said trench toform the smooth vertical sides of said mold.

In testimony whereof I have afiixed my signature in presence of twoWitnesses.

.JAMES M. BOYLE. Witnesses: r

WM. H. SIEGMAN, GERTRUDE T. PORTER.

